Lanthanum oxalate

Chemical compound From Wikipedia, the free encyclopedia

Lanthanum oxalate is an inorganic compound, a salt of lanthanum metal and oxalic acid with the chemical formula La
2
(C
2
O
4
)
3
.[1][2]

Quick facts Names, Identifiers ...
Lanthanum oxalate
Names
Other names
lanthanum(3+);oxalate, lanthanum sesquioxalate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.007.871 Edit this at Wikidata
EC Number
  • 208-656-1
  • InChI=1S/3C2H2O4.2La/c3*3-1(4)2(5)6;;/h3*(H,3,4)(H,5,6);;/q;;;2*+3/p-6
    Key: OXHNIMPTBAKYRS-UHFFFAOYSA-H
  • C(=O)(C(=O)[O-])[O-].C(=O)(C(=O)[O-])[O-].C(=O)(C(=O)[O-])[O-].[La+3].[La+3]
Properties
C
6
La
2
O
12
Molar mass 541.87 g/mol
Appearance colorless crystals
Density g/cm3
poorly soluble
Hazards
GHS labelling:
GHS07: Exclamation markGHS09: Environmental hazard
Warning
H302, H312, H317, H411
P261, P264, P270, P272, P273, P280, P301+P317, P302+P352, P317, P321, P330, P333+P317, P362+P364, P391, P501
Related compounds
Other cations
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Synthesis

Reaction of soluble lanthanum nitrate with an excess of oxalic acid:

2 La(NO3)3 + 3 (COOH)2 → La2(C2O4)3 + 6 HNO3

Also, a reaction of lanthanum chloride with oxalic acid:

2 LaCl3 + 3 H2C2O4 → La2(C2O4)3 + 6 HCl

Physical properties

Lanthanum(III) oxalate forms colorless crystals that are poorly soluble in water.[3]

The compound forms various crystallohydrates La
2
(C
2
O
4
)
3
•nH
2
O
, where n = 1, 2, 3, 7, and 10.[4][5]

The crystallohydrates decompose when heated.[6]

References

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